Novel main shaft assembly positioning device for frame switch operating mechanism

Abstract

The utility model relates to the technical field of electrical switches, in particular to a novel main shaft assembly positioning device for a frame switch operating mechanism, which comprises a circuit breaker body, a frame operating mechanism and a main shaft, a plurality of driving cantilevers are arranged on the main shaft along the axis direction of the main shaft, and a positioning assembly is arranged on the circuit breaker body. The positioning assembly is used for fixing the main shaft on the circuit breaker body, the main shaft is provided with a transmission part used for being in transmission with a frame operation mechanism, the positioning assembly comprises a positioning seat arranged on the circuit breaker body, the positioning seat is in threaded connection with a fastening screw, the fastening screw is sleeved with a bearing bush with a C-shaped cross section, and the main shaft is buckled on the positioning seat through the bearing bush. And the bearing bush is fixed on the positioning seat by the fastening screw. The device has the effects of simple structure, reliable performance, small occupied space, easiness in manufacturing, convenience in mounting and debugging and low cost.

Description

Technical Field

[0001] The present application relates to the technical field of electrical switches, and particularly to a positioning device for a main shaft assembly of a new type of frame switch operating mechanism. Background Art

[0002] With the development of the power industry, frame circuit breakers have always played a crucial role in their development process. As the operating mechanism, which is the core component of the circuit breaker, its performance and operating life and other indicators have also attracted more and more attention from various manufacturers. Among them, the main shaft assembly, which is the connecting part between the operating mechanism and the contact system, is a key component. The more stable the main shaft assembly is during the entire breaking action of the circuit breaker, the more reliable the circuit breaker action is.

[0003] Related technologies disclose a positioning device for a main shaft assembly of a circuit breaker operating mechanism. Refer to Figure 1 , including a frame operating mechanism 1, a bushing 2 is arranged on the frame operating mechanism 1, a fixing screw 3 is threadedly connected to the bushing 2, and the fixing screw 3 fixes the bushing 2 on the frame operating mechanism 1. The bushing 2 includes two shaft unit sleeves 21 with semicircular cross-sections. A clamping groove 22 is provided on the shaft unit sleeve 21, and the shaft unit sleeve 21 is clamped on the frame operating mechanism 1 through the clamping groove 22. A main shaft 4 is passed through the groove between the two shaft unit sleeves 21, and a plurality of driving cantilevers 5 are arranged on the main shaft 4 along its axial direction.

[0004] In the above technology, the main shaft is assembled with the frame operating mechanism by passing through two semicircular shaft unit sleeves clamped on the frame operating mechanism. During the process of passing through the main shaft, it is also necessary to install the driving cantilever, and then carry out the preliminary installation and debugging. If the installed mechanism is unqualified, the worker needs to disassemble the driving cantilever and the main shaft again, resulting in the problem that the installation and debugging of the operating mechanism are more cumbersome. At the same time, the assembly cost of the operating mechanism is increased, and there are deficiencies. Utility Model Content

[0005] In order to improve the cumbersome problem of the main shaft installation and debugging, the present application provides a positioning device for a main shaft assembly of a new type of frame switch operating mechanism.

[0006] The positioning device for a main shaft assembly of a new type of frame switch operating mechanism provided by the present application adopts the following technical solutions:

[0007] A positioning device for a main shaft assembly of a new type of frame switch operating mechanism, including a circuit breaker body, a frame operating mechanism and a main shaft. A plurality of driving cantilevers are arranged on the main shaft along its axial direction. A positioning component is arranged on the circuit breaker body, and the positioning component is used to fix the main shaft on the circuit breaker body. A transmission part for transmitting power with the frame operating mechanism is arranged on the main shaft.

[0008] By adopting the above technical solution, the worker first installs the driving cantilever on the main shaft, then fixes the main shaft on the circuit breaker body through the positioning component, and makes the driving cantilever transmit power with the mechanism on the circuit breaker body. After that, the force on the frame operating mechanism is transmitted to the main shaft through the transmission component. This operation is simple and convenient for installation and debugging, which is beneficial to reducing the manufacturing, assembly and debugging costs of the circuit breaker.

[0009] Optionally, the positioning component includes a positioning seat arranged on the circuit breaker body. A fastening screw is threadedly connected to the positioning seat. A shaft sleeve with a C-shaped cross-section is sleeved on the fastening screw. The shaft sleeve buckles the main shaft on the positioning seat, and the fastening screw fixes the shaft sleeve on the positioning seat.

[0010] By adopting the above technical solution, during assembly, the worker first unscrews the fastening screw, then buckles the main shaft on the positioning seat through the shaft sleeve, and finally tightens the fastening screw. This positioning method has the effects of simple structure, reliable performance, small space occupied by the structure, easy manufacturing, convenient installation and debugging, and low cost. At the same time, it does not affect the basic functions of the main shaft, and increases the reliability of the operating mechanism and the main body circuit breaker.

[0011] Optionally, the transmission component includes two transmission cantilevers arranged on the main shaft. A transmission shaft is arranged between the two transmission cantilevers. The frame operating mechanism is used to drive the transmission shaft.

[0012] By adopting the above technical solution, the force transmitted on the frame operating mechanism drives the transmission shaft to rotate. The transmission shaft drives the main shaft to rotate through the transmission cantilever. The main shaft transmits the impact from the frame operating mechanism to the circuit breaker body through the positioning seat and the shaft sleeve, which is beneficial to reducing the wear during the transmission process of the frame operating mechanism.

[0013] Optionally, the positioning component includes a fixed seat arranged on the circuit breaker body. A pressing block is rotatably arranged on the fixed seat. Through slots are formed on both the fixed seat and the pressing block. The through slot on the pressing block presses the main shaft on the through slot on the fixed seat. A locking member is arranged on the fixed seat, and the locking member fixes the pressing block on the fixed seat.

[0014] By adopting the above technical solution, the worker rotates the pressing block, then places the main shaft on the through slot on the fixed seat, then rotates the pressing block so that the through slot on the pressing block buckles on the main shaft, and finally fixes the pressing block on the fixed seat through the locking member. This operation is simple and fast, which is beneficial to reducing the installation and debugging difficulty of the worker.

[0015] Optionally, the locking member includes a fastening screw rotatably disposed on the fixed seat. A clamping groove is formed on the pressing block, and the clamping groove is clamped on the fastening screw. A sheep's horn nut is threadedly connected to the fastening screw, and the sheep's horn nut is used to tightly press the pressing block.

[0016] By adopting the above technical solution, after the through groove on the pressing block is buckled on the main shaft, the worker rotates the fastening screw, and the fastening screw rotates into the clamping groove on the pressing block, and then tightens the sheep's horn nut to make the sheep's horn nut tightly press on the pressing block.

[0017] Optionally, a semi-convex ring strip is coaxially arranged on the through groove of the pressing block, and a ring groove for clamping the semi-convex ring strip is coaxially formed on the main shaft, and the semi-convex ring strip is in rotational cooperation with the ring groove on the main shaft.

[0018] By adopting the above technical solution, through the clamping cooperation between the semi-convex ring strip and the ring groove on the main shaft, it is convenient for the worker to position the main shaft when installing the main shaft, which is beneficial to reducing the difficulty of adjusting the position of the main shaft when the worker installs the main shaft.

[0019] Optionally, a ball is rotatably arranged on the semi-convex ring strip, and the ball is in rolling cooperation with the bottom of the ring groove of the main shaft.

[0020] By adopting the above technical solution, when the main shaft rotates, the ball is in rolling cooperation with the bottom of the ring groove, and by reducing the contact area between the ring groove on the main shaft and the semi-convex ring strip, the service life of the main shaft and the semi-convex ring strip is prolonged.

[0021] Optionally, a graphite ring piece is coaxially arranged on the through groove of the fixed seat, and the cross section of the graphite ring piece is in a C shape.

[0022] By adopting the above technical solution, it is beneficial to further reduce the wear of the main shaft during rotation, and further prolong the service life of the main shaft.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. The worker first installs the driving cantilever on the main shaft, then fixes the main shaft on the circuit breaker body through the positioning component, and makes the driving cantilever drive with the mechanism on the circuit breaker body. Then, the force on the frame operating mechanism is transmitted to the main shaft through the transmission member. This operation is simple for installation and debugging, which is beneficial to reducing the manufacturing, assembly and debugging costs of the circuit breaker;

[0025] 2. During assembly, the worker first unscrews the fastening screw, then buckles the main shaft on the positioning seat through the bearing bush, and finally screws the fastening screw tightly. This positioning method has the effects of simple structure, reliable performance, small structural space occupation, easy manufacturing, convenient installation and debugging, and low cost. At the same time, it does not affect the basic functions of the main shaft, and increases the reliability of the operating mechanism and the breaker body.

[0026] 3. The worker rotates the pressing block, then places the main shaft on the through slot on the fixed seat, then rotates the pressing block so that the through slot on the pressing block buckles on the main shaft, and finally fixes the pressing block on the fixed seat through the locking part. This operation is simple and fast, which is beneficial to reducing the difficulty of installation and debugging for the worker. Brief Description of the Drawings

[0027] Figure 1 is a schematic structural diagram of the background art.

[0028] Figure 2 is a schematic structural diagram of Embodiment 1 of the present application.

[0029] Figure 3 is a schematic structural diagram of the positional relationship among the transmission cantilever, the frame operating mechanism and the bearing bush in Embodiment 1 of the present application.

[0030] Figure 4 is a schematic structural diagram of the positional relationship among the fixed seat, the pressing block and the semi-convex ring strip in Embodiment 2 of the present application.

[0031] Description of the reference numerals: 1. Frame operating mechanism; 2. Bush; 21. Shaft unit bush; 22. Clamping groove; 3. Fixed screw; 4. Main shaft; 5. Driving cantilever; 6. Breaker body; 7. Positioning assembly; 71. Positioning seat; 72. Fastening screw; 73. Bearing bush; 74. Fixed seat; 75. Pressing block; 76. Through slot; 77. Locking part; 771. Fastening screw rod; 772. Card slot; 773. Goat's horn nut; 8. Transmission part; 81. Transmission cantilever; 82. Transmission shaft; 9. Semi-convex ring strip; 10. Ring groove; 11. Ball; 12. Graphite ring piece. Detailed Description of the Embodiment

[0032] The following further elaborates on the present application in conjunction with the attached Figures 2 - 4 for a more detailed description of the present application.

[0033] Embodiment 1 of the present application discloses a positioning device for the main shaft assembly of a new type of frame switch operating mechanism.

[0034] Embodiment 1

[0035] Refer to Figure 2 and Figure 3, A positioning device for the main shaft assembly of a new type of frame switch operating mechanism includes a circuit breaker body 6, a frame operating mechanism 1, and a main shaft 4. Along the axial direction of the main shaft 4, a plurality of driving cantilevers 5 are arranged. On the main shaft 4, a transmission member 8 for transmitting power to the frame operating mechanism 1 is arranged. The transmission member 8 includes two transmission cantilevers 81 arranged along the axial direction of the main shaft 4. A transmission shaft 82 is arranged between the two transmission cantilevers 81. The frame operating mechanism 1 is used to drive the transmission shaft 82.

[0036] Referring to Figure 2 and Figure 3 , on the circuit breaker body 6, a positioning component 7 is arranged. The positioning component 7 is used to fix the main shaft 4 on the circuit breaker body 6. The positioning component 7 includes a positioning seat 71 welded to the circuit breaker body 6. A fastening screw 72 is threadedly connected to the positioning seat 71. A shaft sleeve 73 with a C-shaped cross-section is sleeved on the fastening screw 72. The groove part of the shaft sleeve 73 buckles the main shaft 4 on the positioning seat 71, and the fastening screw 72 fixes the shaft sleeve 73 on the positioning seat 71.

[0037] The implementation principle of Embodiment 1 is as follows: During assembly, the worker first installs the driving cantilever 5 and the transmission cantilever 81 at the designed positions on the main shaft 4. Then the worker unscrews the fastening screw 72 and removes the shaft sleeve 73. After that, the main shaft 4 is placed on the positioning seat 71, and the main shaft 4 is buckled on the positioning seat 71 through the shaft sleeve 73. Finally, the fastening screw 72 is tightened to fix the shaft sleeve 73 on the positioning seat 71.

[0038] Embodiment 2

[0039] Refer to Figure 4 , the difference between this embodiment and Embodiment 1 is that: the positioning component 7 includes a fixed seat 74 welded to the circuit breaker body 6. A pressing block 75 is rotatably connected to the fixed seat 74. On the opposite sides of the fixed seat 74 and the pressing block 75, through slots 76 with a C-shaped cross-section are opened. A graphite ring 12 with a C-shaped cross-section is coaxially pasted on the through slot 76 of the fixed seat 74.

[0040] Refer to Figure 4 , a semi-convex ring strip 9 is coaxially welded on the through slot 76 of the pressing block 75. A ring groove 10 for the semi-convex ring strip 9 to be clamped is coaxially opened on the main shaft 4. The semi-convex ring strip 9 is in rotational fit with the ring groove 10 on the main shaft 4. A plurality of balls 11 are rotatably arranged on the semi-convex ring strip 9. The balls 11 are in rolling fit with the bottom of the ring groove 10 on the main shaft 4. The through slot 76 on the pressing block 75 presses the main shaft 4 onto the through slot 76 on the fixed seat 74.

[0041] Referring to Figure 4, a locking member 77 is arranged on the fixed seat 74. The locking member 77 fixes the pressing block 75 on the fixed seat 74. The locking member 77 includes a fastening screw rod 771 rotatably connected to the fixed seat 74. A clamping groove 772 is formed on the pressing block 75. The clamping groove 772 is stuck on the fastening screw rod 771. A toggle nut 773 is threadedly connected to the fastening screw rod 771. The toggle nut 773 is used to press tightly against the pressing block 75.

[0042] The implementation principle of Embodiment 2 is as follows: During assembly, the worker rotates to open the pressing block 75, then places the assembled main shaft 4 in the through groove 76 on the fixed seat 74, so that the main shaft 4 presses on the graphite ring 12. Then the worker adjusts the position of the main shaft 4 and rotates the pressing block 75, so that the semi-convex ring strip 9 on the pressing block 75 is clamped in the ring groove 10 of the main shaft 4. After that, the worker rotates the fastening screw rod 771 to make the fastening screw rod 771 turn into the clamping groove 772 of the pressing block 75. Finally, the toggle nut 773 is tightened so that the toggle nut 773 presses tightly against the pressing block 75.

[0043] The above are all the preferred embodiments of this application. The protection scope of this application is not limited by this. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A positioning device for the main shaft assembly of a new type of frame switch operating mechanism, comprising a circuit breaker body (6), a frame operating mechanism (1) and a main shaft (4), wherein a plurality of driving cantilevers (5) are arranged on the main shaft (4) along its axial direction, and it is characterized in that: A positioning component (7) is provided on the circuit breaker body (6). The positioning component (7) is used to fix the main shaft (4) on the circuit breaker body (6). A transmission member (8) for transmitting power to the frame operating mechanism (1) is provided on the main shaft (4).

2. The positioning device for the main shaft assembly of a novel frame switch operating mechanism according to claim 1, characterized in that: The positioning component (7) includes a positioning seat (71) provided on the circuit breaker body (6). A fastening screw (72) is threadedly connected to the positioning seat (71). A bearing bush (73) with a C-shaped cross-section is sleeved on the fastening screw (72). The bearing bush (73) buckles the main shaft (4) on the positioning seat (71), and the fastening screw (72) fixes the bearing bush (73) on the positioning seat (71).

3. The positioning device for the main shaft assembly of a novel frame switch operating mechanism according to claim 1, characterized in that: The transmission member (8) includes two transmission cantilevers (81) provided on the main shaft (4). A transmission shaft (82) is spanned between the two transmission cantilevers (81). The frame operating mechanism (1) is used to drive the transmission shaft (82).

4. A positioning device for the main shaft assembly of a novel frame switch operating mechanism according to claim 1, characterized in that: The positioning component (7) includes a fixed seat (74) provided on the circuit breaker body (6). A pressing block (75) is rotatably provided on the fixed seat (74). Through slots (76) are formed on both the fixed seat (74) and the pressing block (75). The through slot (76) on the pressing block (75) presses the main shaft (4) against the through slot (76) on the fixed seat (74). A locking member (77) is provided on the fixed seat (74), and the locking member (77) fixes the pressing block (75) on the fixed seat (74).

5. A positioning device for the main shaft assembly of a novel frame switch operating mechanism according to claim 4, characterized in that: The locking member (77) includes a fastening screw (771) rotatably provided on the fixed seat (74). A clamping groove (772) is formed on the pressing block (75). The clamping groove (772) is stuck on the fastening screw (771). A sheep's horn nut (773) is threadedly connected to the fastening screw (771), and the sheep's horn nut (773) is used to press against the pressing block (75).

6. A positioning device for the main shaft assembly of a novel frame switch operating mechanism according to claim 4, characterized in that: A semi-convex ring strip (9) is coaxially provided on the through slot (76) of the pressing block (75). A ring groove (10) for clamping the semi-convex ring strip (9) is coaxially formed on the main shaft (4). The semi-convex ring strip (9) is in rotational cooperation with the ring groove (10) on the main shaft (4).

7. A positioning device for the main shaft assembly of a novel frame switch operating mechanism according to claim 6, characterized in that: A ball (11) is rotatably provided on the semi-convex ring strip (9). The ball (11) is in rolling cooperation with the bottom of the ring groove (10) of the main shaft (4).

8. A positioning device for the main shaft assembly of a novel frame switch operating mechanism according to claim 4, characterized in that: A graphite ring piece (12) with a C-shaped cross-section is coaxially provided on the through slot (76) of the fixed seat (74).

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